12+x=0.8(20+x)

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Solution for 12+x=0.8(20+x) equation: 



12+x=0.8(20+x)

We move all terms to the left:

12+x-(0.8(20+x))=0

We add all the numbers together, and all the variables

x-(0.8(x+20))+12=0



We calculate terms in parentheses: -(0.8(x+20)), so:

0.8(x+20)

We multiply parentheses

0.8x+16

Back to the equation:

-(0.8x+16)



We get rid of parentheses

x-0.8x-16+12=0

We add all the numbers together, and all the variables

0.2x-4=0

We move all terms containing x to the left, all other terms to the right

0.2x=4

x=4/0.2

x=20

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